Added wxMemoryBuffer::Clear() and IsEmpty() methods.

Add two convenient methods which may be used instead of testing or setting the
buffer length.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70407 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/include/wx/buffer.h b/include/wx/buffer.h
index e0644474e8f1fe019c143956689016675d5073c6..800c41b71431183f652977a56ab2411c3e7facbe 100644 (file)
--- a/include/wx/buffer.h
+++ b/include/wx/buffer.h
@@ -535,6 +535,8 @@ public:
     size_t GetBufSize() const { return m_bufdata->m_size; }
     size_t GetDataLen() const { return m_bufdata->m_len; }
 
+    bool IsEmpty() const { return GetDataLen() == 0; }
+
     void   SetBufSize(size_t size) { m_bufdata->ResizeIfNeeded(size); }
     void   SetDataLen(size_t len)
     {
@@ -542,6 +544,8 @@ public:
         m_bufdata->m_len = len;
     }
 
+    void Clear() { SetDataLen(0); }
+
     // Ensure the buffer is big enough and return a pointer to it
     void *GetWriteBuf(size_t sizeNeeded)
     {

diff --git a/interface/wx/buffer.h b/interface/wx/buffer.h
index f9ce4835efa48e882ead5afad549859ff1916349..4ef51bac3bfc6059e613d347123694040f5f28bd 100644 (file)
--- a/interface/wx/buffer.h
+++ b/interface/wx/buffer.h
@@ -309,6 +309,17 @@ public:
     */
     void AppendData(const void *data, size_t len);
 
+    /**
+        Clear the buffer contents.
+
+        The buffer won't contain any data after this method is called.
+
+        @see IsEmpty()
+
+        @since 2.9.4
+     */
+    void Clear();
+
     /**
         Ensure that the buffer is big enough and return a pointer to the start
         of the empty space in the buffer. This pointer can be used to directly
@@ -343,6 +354,15 @@ public:
     */
     void* GetWriteBuf(size_t sizeNeeded);
 
+    /**
+        Returns true if the buffer contains no data.
+
+        @see Clear()
+
+        @since 2.9.4
+     */
+    bool IsEmpty() const;
+
     /**
         Ensures the buffer has at least @a size bytes available.
     */